atomic_swap.S revision 1.2
1 1.2 ad /* $NetBSD: atomic_swap.S,v 1.2 2007/11/28 17:29:33 ad Exp $ */ 2 1.2 ad 3 1.2 ad /*- 4 1.2 ad * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 1.2 ad * All rights reserved. 6 1.2 ad * 7 1.2 ad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 ad * by Jason R. Thorpe. 9 1.2 ad * 10 1.2 ad * Redistribution and use in source and binary forms, with or without 11 1.2 ad * modification, are permitted provided that the following conditions 12 1.2 ad * are met: 13 1.2 ad * 1. Redistributions of source code must retain the above copyright 14 1.2 ad * notice, this list of conditions and the following disclaimer. 15 1.2 ad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 ad * notice, this list of conditions and the following disclaimer in the 17 1.2 ad * documentation and/or other materials provided with the distribution. 18 1.2 ad * 3. All advertising materials mentioning features or use of this software 19 1.2 ad * must display the following acknowledgement: 20 1.2 ad * This product includes software developed by the NetBSD 21 1.2 ad * Foundation, Inc. and its contributors. 22 1.2 ad * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2 ad * contributors may be used to endorse or promote products derived 24 1.2 ad * from this software without specific prior written permission. 25 1.2 ad * 26 1.2 ad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2 ad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2 ad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2 ad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2 ad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2 ad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2 ad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2 ad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2 ad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2 ad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2 ad * POSSIBILITY OF SUCH DAMAGE. 37 1.2 ad */ 38 1.2 ad 39 1.2 ad #include "atomic_op_asm.h" 40 1.2 ad 41 1.2 ad .text 42 1.2 ad 43 1.2 ad ENTRY_NOPROFILE(_atomic_swap_32) 44 1.2 ad ld [%o0], %o2 45 1.2 ad 1: mov %o1, %o3 46 1.2 ad cas [%o0], %o2, %o3 47 1.2 ad cmp %o2, %o3 48 1.2 ad bne,a,pn %icc, 1b 49 1.2 ad mov %o3, %o2 50 1.2 ad retl 51 1.2 ad mov %o3, %o0 52 1.2 ad ATOMIC_OP_ALIAS(atomic_swap_32,_atomic_swap_32) 53 1.2 ad ATOMIC_OP_ALIAS(atomic_swap_uint,_atomic_swap_32) 54 1.2 ad STRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32) 55 1.2 ad 56 1.2 ad ENTRY_NOPROFILE(_atomic_swap_64) 57 1.2 ad ldx [%o0], %o2 58 1.2 ad 1: mov %o1, %o3 59 1.2 ad casx [%o0], %o2, %o3 60 1.2 ad cmp %o2, %o3 61 1.2 ad bne,a,pn %icc, 1b 62 1.2 ad mov %o3, %o2 63 1.2 ad retl 64 1.2 ad mov %o3, %o0 65 1.2 ad ATOMIC_OP_ALIAS(atomic_swap_64,_atomic_swap_64) 66 1.2 ad ATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_64) 67 1.2 ad STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_64) 68 1.2 ad ATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_64) 69 1.2 ad STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_64) 70
Indexes created Wed Oct 22 06:10:02 GMT 2025